武汉市周边分蓄洪区特征参数复核研究

Verification of characteristic parameters for flood diversion areas around Wuhan City

不同出版物对于武汉周边几个分蓄洪区的蓄洪面积、蓄洪容积等特征参数存在着较大的差异。通过比较几种分蓄洪区蓄洪面积、容积计算方法的精度,采用高精度DEM对武汉周边数个分蓄洪区的特征参数进行了复核,发现本次复核值与规划值差别较大,分蓄洪区的底水位、蓄洪面积及容积等特征参数规划值均存在着一定的不合理之处,特别是涨渡湖分蓄洪区的蓄洪面积,存在着较为明显的差异,因此需要规划单位进一步的复核计算分析。通过蓄洪面积及容积复核和底水位分析,发现武汉周边分蓄洪区存在着更大的蓄洪潜力和超额洪量调蓄能力。本研究可为相关规划修编提供参考。

There are significant differences in various versions publications on characteristic parameters of flood diversion/detention areas around Wuhan,such as the surface area and storage capacity.In this paper, calculation precision of several methods is compared for surface area and storage capacity,and characteristic parameters of flood diversion/detention areas around Wuhan are verified using high-precision DEM.The results show significant differences between review values and planning values,and there are some unreasonable characteristic parameters of bottom water level in flood diversion/detention areas,especially obvious differences in the storage area of Zhangduhu flood diversion.Therefore,it is necessary for further review on the calculation and analysis for characteristic parameters of flood diversion areas around Wuhan.It ＇s also revealed that flood diversion/detention areas around Wuhan may have larger flood storage capacities.This study provides reliable basic information for the relevant planning revision.